RE: [PSUBS-MAILIST] Troller motors

["Helmandollar, Troy A" <HelmanTA@bp.com>]

I'm not sure but sealed bearings don't handle much pressure. How much, I
don't know.  I was thinking of just using a used troller motor and just tap
into the case with the balance line.  The advantage of using the troller
motors that I can see is that you get all the controls for them.  As far as
electrical penetrations go I just made my own last night using a  stainless
fitting that had a shoulder inside filled with epoxy.  I stripped two solid
wires and stuck them through the fitting.  I tested the fitting to 2400 psi
with a hydraulic enerpack.  Held fine.

-----Original Message-----
From: Brian Cox [mailto:ojaibees@ojai.net]
Sent: Sunday, June 29, 2003 7:46 AM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Troller motors


Hi,  Can't the motor be encased in it's own 1 atm. vessel and the shaft run
through a sealed bearing?

Brian

----- Original Message -----
From: "Helmandollar, Troy A" <HelmanTA@bp.com>
To: <personal_submersibles@psubs.org>
Sent: Sunday, June 29, 2003 2:51 AM
Subject: [PSUBS-MAILIST] Troller motors


> This might have been discussed before. But I am wondering if anybody has
> used a sensing line from the top of their trim ballast to pressure
> compensate their motors.  This way it is all done automatically.  The only
> drawback that I can see is water getting into the sensing line.  This can
be
> mitigated by positioning the blow down line well below the sensing line,
so
> the water doesn't reach the sensing line.
>